Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad2ca7142a6826d…

MALICIOUS

PDF

81.4 KB Created: 2021-09-07 05:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 616373d1a4ddd522dc351db395627f27 SHA-1: 057ceadbc5d5990e26ed1982cd5576bc0b4e5966 SHA-256: 9ad2ca7142a6826dbf37a29b80d0d2b37b3eb7ee92593848aa955085f2918e21
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external URIs, many of which point to compromised websites or link farms. The ML classifier strongly indicated maliciousness, and the structure suggests the document is designed to redirect users to potentially harmful sites. No scripts were extracted, but the overall pattern indicates a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://philabc.ru/uplcv?utm_term=tnpsc+group+4+2019+general+studies+material+pdf PDF link annotation
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/3pd35n67h2mujquu23ubtqgv9e/wadaki.pdfIn PDF document text
    • https://fokusmedia.com/images/uploads/5617787537.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/5d60a87a5df32fae43918e63fd33a98f/gotevoluwaka.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdb9dbdfc5f---xujolubalutogawekarufupu.pdfIn PDF document text
    • http://rigdrilling.org/userfiles/file/95083760408.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/8aec811b764f62c70bf6f4f98fe6cee3/18667845433.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2ebcb6e8e---32449549767.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609e30ec96e83---dezonikamefot.pdfIn PDF document text
    • http://bc-arman.kz/ckfinder/userfiles/files/55065567711.pdfIn PDF document text
    • http://bsa.by/ckfinder/userfiles/files/zexevamifigij.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e2d08f48c---xiwufafukizenoburofeg.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/a5f417b0ed836936d950446359911988/70006063316.pdfIn PDF document text
    • http://haiqi-machine.com/d/files/81542237949.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606c835a3955a---fexuderugorejukofiwiwexa.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/10f9371b8855a826e878f3449c67e30d/48426697350.pdfIn PDF document text
    • https://daquin-ferriere.fr/userfiles/file/23813888972.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bce9a23cfaf---75409995010.pdfIn PDF document text
    • https://vivekanandbawwa.com/userfiles/file/zimadefu.pdfIn PDF document text
    • http://edwardfmcgintypa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/toxel.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa463171b5---funolenujamujapunu.pdfIn PDF document text
    • http://cottoneauto.it/userfiles/files/sujasovawotomowizesetokop.pdfIn PDF document text
    • http://chothuexeninhbinh.net/data/dulieu/files/rugejedemajekizovixub.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/vopazepijifazepobu.pdfIn PDF document text
    • http://snnet.kr/board_pds/fckeditor/2021/07/file/2787274393.pdfIn PDF document text
    • http://omni-links-europe.com/gebuzof.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d38a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38A 11568 bytes
SHA-256: 0c0b4bff28736942b6f1a309ac38fbccb76affd91b476137468cdf5a5938373e
font_01_sfnt_off0000eedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDD 17776 bytes
SHA-256: 7644c155b11f4e7e9640dc1756272d0ed6c662a30a45fb92caf9e3a2878e9126
font_02_sfnt_off00011d8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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